NSES Content Standard F  
Science in Personal and Social Perspectives: Types of resources 
Grades K-4, page 140 

The supply of many resources is limited. If used, resources can be extended through recycling and decreased use. 
 

 
Benchmark 5D The Living Environment: Interdependence of Life
Grades 3-5, page 116
Insects and various other organisms depend on dead plant and animal material for food.

Benchmark 7E Human Society: Political and Economic Systems
Grades 3-5, page 169
There are not enough resources to satisfy all of the desires of all people, and so there has to be some way of deciding who gets what.

Benchmark 8B The Designed World: Materials and Manufacturing
Grades K-2, page 188
Some materials can be used over again.

Benchmark 8B The Designed World: Materials and Manufacturing
Grades 3-5, page 189
Discarded products contribute to the problem of waste disposal. Sometimes it is possible to use the materials in them to make new products, but materials differ widely in the ease with which they can be recycled.